<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <title>01_计算属性实现姓名案例</title>
        <!-- 引入Vue -->
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <!-- 准备好一个容器-->
        <div id="demo">
            姓：<input type="text" v-model="firstName"> <br/><br/>
            名：<input type="text" v-model="lastName"> <br/><br/>
            全名：<span>{{fullName}}</span> <br/><br/>
            <button @click="changeFullName">将全名改为：Li-si</button>
        </div>
    </body>

    <script type="text/javascript">
        //阻止 vue 在启动时生成生产提示。
        Vue.config.productionTip = false
        new Vue({
            el:'#demo',
            data:{
                firstName:'li',
                lastName:'xiaohua',
            },
            methods:{
                changeFullName(){
                    this.fullName = 'Li-ddadadadda'
                }
            },
            computed:{
                fullName:{
                    get(){
                        const {firstName,lastName} = this;
                        return firstName + '-' + lastName;
                    },
                    set(val){
                        const arr = val.split('-');
                        this.firstName = arr[0];
                        this.lastName = arr[1];
                    }
                }
            }
        })
    </script>
</html>